Cisco Systems DSC9148D8G48PK9 manual Graceful Shutdown

Chapter 2 Configuring Interfaces

Information About Interfaces

Table 2-4	Reason Codes for Nonoperational States (continued)
			Applicable
Reason Code (long version)		Description	Modes
Isolation due to ELP failure		The port negotiation failed.	Only E ports
			and TE ports
Isolation due to ESC failure		The port negotiation failed.
Isolation due to domain		The Fibre Channel domains (fcdomain) overlap.
overlap
Isolation due to domain ID		The assigned domain ID is not valid.
assignment failure
Isolation due to the other side		The E port at the other end of the link is isolated.
of the link E port isolated
Isolation due to invalid fabric		The port is isolated due to fabric reconfiguration.
reconfiguration
Isolation due to domain		The fcdomain feature is disabled.
manager disabled
Isolation due to zone merge		The zone merge operation failed.
failure
Isolation due to VSAN		The VSANs at both ends of an ISL are different.
mismatch
Nonparticipating		FL ports cannot participate in loop operations. It may	Only FL
		happen if more than one FL port exists in the same	ports and TL
		loop, in which case all but one FL port in that loop	ports
		automatically enters nonparticipating mode.
PortChannel administratively		The interfaces belonging to the PortChannel are down.	Only
down			PortChannel
			interfaces
Suspended due to incompatible		The interfaces belonging to the PortChannel have
speed		incompatible speeds.
Suspended due to incompatible		The interfaces belonging to the PortChannel have
mode		incompatible modes.
Suspended due to incompatible		An improper connection is detected. All interfaces in a
remote switch WWN		PortChannel must be connected to the same pair of
		switches.

Graceful Shutdown

Interfaces on a port are shut down by default (unless you modified the initial configuration).

The Cisco NX-OS software implicitly performs a graceful shutdown in response to either of the following actions for interfaces operating in the E port mode:

•If you shut down an interface.

•If a Cisco NX-OS software application executes a port shutdown as part of its function.

A graceful shutdown ensures that no frames are lost when the interface is shutting down. When a shutdown is triggered either by you or the Cisco NX-OS software, the switches connected to the shutdown link coordinate with each other to ensure that all frames in the ports are safely sent through the link before shutting down. This enhancement reduces the chance of frame loss.

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x		2-9